Rocket projectile



Inventur' Leslie A -E-Jk'lni-Ler 21' M17. y z Attum g Patented Mar.19,1985 1,994,490

UNITED, STATES PATENT OFFICE nocxa'r PROJECTILE Leslie A. Skinner, United States Army, Aberdeen Proving Ground, Md.

Application September 11, 1934, Serial No. 143,541

8 Claims. (01. 1112-23) (Granted under the act of March 3, 1883, as

amended April 30, 1928; 370 0. G. 757) The invention described herein may be menu tion of the charge increases the volume of the factured and used by or for the Government for chamber available for the gases. governmental purposes, without the payment to The rear end of the rear part 8 is provided me of any royalty thereon. with an opening for receiving the end of a' 5 This invention relates to a rocket projectile. tube 16 which is secured by a threaded connec- 5 The purpose of the invention is to provide a tion 17 and is almost as long as the body of the projectile adapted to be discharged from the projectile. The tube 16 is preferably tapered, barrel of a mortar and to carry an auxiliary probeing enlarged towards its rear end, and it is open pelling charge functioning during flight to conat both ends. In the front open end there is m tinue propulsion of the projectile in the manner placed a delay pellet 18 associated with an ignitcommon to rockets. ing charge 19 for igniting the propelling charge The invention is characterized by a novel ar- 9. A cartridge 20 in therear open end of the rangen ent in which the body is partitioned to tube is fired by the usual primer 21 and serves carry a bursting and a propelling charge, and the to ignite the delay pellet 18 and also one or more tail is in the form of a tube constituting a stabilizpropelling charges 22 which are carried between ing member and an exhaust conduit for the the fins 23 fixed to the tube 16. The cartridge gases of the propelling charge. case-24 is preferably of highly inflammable ma- With the foregoing and other objects in view, terial such as celluloid or nitrocellulose so that it the invention resides in the novel arrangement is capable of contributing to thepropelling force 20 and combination of parts and in the details of and when it is consumed the tube 16 is unobconstruction hereinafter described and claimed, structed. it being understood that changes in the precise In the modification shown in Fig. 2 the external embodiment f the invention herein disclosed y fins are omitted and inclined vanes 25 are secured he made Within the S p of W is eleimed to the irmer wall of the tube 16 whereby a rota- 25 without departing from the spirit of the invention. tional effect is produced by the gases issuing out 25 Apractical embodiment of the invention is illusof th tub trated in the pa in wi w ein: The rocket projectile is to be discharged from Fig. 1 isalongitudinal Sectional View of areeket a mortar and is muzzle-loaded into the barrel projectile constructed in accordance with the of the rtar in the well known manner eminvention. ployed with trench mortars. The primer is fired 3 Fi 2 s a similar v w o the ta ow a by afixed firing pin in the breech end of the barrel modified arrangement of the fins vanesand the cartridge 20 and charges 21 propel the Refe o t d aw by characters projectile. During its flight and after the proer there is shown a Projectile Consisting. O a jectile is well clear of the gun crew the delay pellet body A and a a 3.- 18 transmits ignition to the charge 9. The rapid 35 The b dy. is prefera ly, formed of t Da t the combustion of the charge 9 produces a large volfrOnt Part. 5 containing e bursting charge 6 ume of gas which is forcibly expelled through the adapted to be set off by a conventional fuse '7 car- 1 t 1 and by impact on t air propels t 40 ried in its nose and the rear part-8 containing a jectile, The bursting charge 6 is set off upon gas-forming propelling Charge T Parts impact or at the expiration of a prescribedtime and 8 are conveniently joined by a threaded condepending on t t of fuse employed, nection 10. I claim.

The forward end of the rearpart 8 is closed by 1 A rocket projectile comprising b an. 4 a heavy metalplate 11 secured by a threaded con-' insulated t t th body, bursting charge j nection 12. A thick disc 13 of insulating matein front of th partition, propelling charge in rial, fitting in the rear part 8 and against the rear of the partition, a tube fixed to the rear part front face of the'plate 11 serves to prevent heat of the body, a delay pellet in the front end of the exchange from the propelling charge 9 to the tube, a cartridge in the rear end of the tube, fins bursting charge 6. The rear face 14 of the plate on the outside of the tube, and a propellent charge 50 isconcave to provide increased capacity to the o the Ou s d Of the tu chamber. The rear part 8 is preferably of in- A rocket P oj ctile Comprising a body,a procreasing cross-sectional area, being conical in Felling Charge in the y, a b fix t0 e e shape so that the burning area of the propelling part of the body, a delay pellet in the front end of charge increases as the combustion and consumph tube, a cartridge n the r end f h tube.

5 gases of the propelling charge, and means in the of the body, a delay pellet in the-front end of the tube, and a cartridge in the rear end of the tube.

5. A rocket comprising a body, a propelling charge in the body, a tube fixed to the body and forming a tail and an exhaust conduit for the tail for igniting the propelling charge.

6. A rocket projectile comprising a body, a bursting charge in the body, a propelling charge in the body, a tube fixed to the body, means in the tube for igniting the propelling charge in the body, and a propelling charge on the outside of the tube.

7.- A rocket comprising a body having va chamber increasing in cross-sectional area from rear to front, a propelling charge in said chamber, and a tube on the body at the small end of the chamber for venting the gases of the propelling charge.

8. A rocket comprising a body having a chamber increasing in cross-sectional area from rear to front, a propellingcharge in said chamber, and a vent at the small end of the chamber.

- LESLIE A. SKINNER. 

